Police have identified the bicyclist who was killed after being hit by a semi-truck as 58-year-old Darwin Barve of Hilo. KITV-4 sources tell us Barve is Big Island Mayor Billy Kenoi's HALF BROTHER. Police say a pedal on Barve's BIKE may have struck something -- causing him to fall into the path of the semi. It happened on Route 19 -- near the 3-mile marker on Saturday. Barve was taken to the Hilo Medical Center -- where he later died. A negligent homicide investigation is underway.